Encoding/Decoding
VBR (Variable Bit Rate) means that CODEC (coder-decoder) can auto adjust bandwidth according to data quantity. In other words, when frames change fast and have multi colors, occupation of bandwidth will be larger; otherwise, when frames change slowly and have simple colors, occupation of bandwidth will be smaller. Thus we can not only guarantee the quality of video recording, but also save occupation of HD (hard disk) utmostly.
CBR (Constant Bit rate) means that CODEC (coder-decoder) occupies fixed bandwidth. This to say no matter how big data quantity is, when frames change fast and have multi colors, recording quality will be decreased due to lack of bandwidth; otherwise, when data quantity is small and bandwidth is excess, the capacity of HD (hard disk) is wasted.
